- #1
enchanteuse
- 10
- 0
Homework Statement
A spring has a relaxed length of 7 cm and a stiffness of 200 N/m. How much work must you do to change its length from 10 cm to 14 cm?
Homework Equations
Ef = Ei + W
The Attempt at a Solution
Ef = Ei + W
Ef = Ei + F*delta x
F*delta x = Ef - Ei
F*delta x = (Ki + Ui) - (Kf + Uf)
F*delta x = (1/2mvi^2 + 1/2ks si^2) - (1/2mvf^2 + 1/2ks sf^2)
I'm trying to break this equation apart to try to figure this out, but I'm not sure what to do next. Help!
Thanks